package main

import "fmt"

func main() {
	var a = -7
	var b = 3
	fmt.Println(a + b)
	fmt.Println(a - b)
	fmt.Println(a * b)
	fmt.Println(a / b) //7/3取整为2
	fmt.Println(a % b)
	var c = 9
	c++
	fmt.Println("c=", c)
	var d = 8939
	d--
	fmt.Println("d=", d)
}
